Improvement in stove-pipe joints



UNTTRR STATRs PATENT @Fries H. R. MORRISON, Ior

LE ROY, NEW YORK.

IMPROVEMENT IN STOVE-PIPE JOINTS.

Specilieation forming part of Letters Patent No. 99,459, dated February1, lS'O.

To all whom 'it may concern:

Y Be it known that I, E. B. MORRISON, of Le Roy, in the county ofGenesee and State of New York, have invented a certain new and usefulImprovement in Elbow-Joints for Hot- Air and other Pipes; and `I dohereby declare that the following is a full and exact descrip` tion ofthe same, reference being had to the accompanying drawings, in which-Figure l is a view in perspective of my improved elbow adjusted with adouble bend; Fig. 2, a section of the same in a rightvangled position;Fig. 3, a section of the seam or joint enlarged.

This invention is an improvement upon that patented to me October 271868; and consists, tirst, in the employment of loose rings, combinedwith the ends of the elbow, in such a manner as to adjust to differentpositions by a reverse movement 5 second, in an improved joint or seamfor adjusting the parts; and, third, in the use of a rod for clampingthe parts together.

In the drawings, AA represent the ends of the elbow, which connect withthe mains of the pipe; and B B represent the rings, any desired numberof which maybe used. These rings are of wedgin g or angular form, andthey are so connected with each other and with the ends of the elbow bythe improved seam or joint, hereinafter described, as to be capable ofturning in different directions by a reverse movement.

In Fig. l a double bend of the elbow is produced. ln Fig. 2 aright-angled form is shown by black lines, and a different bend indotted lines.` In fact, almost any single or double angle or bend, froma right angle to a straight line, may be produced by the proper reversedturns ot' the rings, by which means the elbow may be adapted to any turnor twist of the main pipe at the moment of application, and withoutgoing to a shop to make a device for the special purpose. When fittedand adapted in such position it is fixed stationary by simply nipping upthe seams by a proper instrument.

I am aware that hot-air pipes have been constructed in stationarysections that resemble in form the rings B, only that the narrow partsof the rings always come together, thus producing not a double bend, butsimply a difference in angle of a single bend, according as the width ofthe narrow parts was varied.

I do not claim simply making an elbow in sections to produce the properbend 5 but the novelty in my case consists in the employment of wedgingor angular rings, connected with each other and with the ends of theelbow in such a manner as to have a loose joint, so that a reversemovement of any two or more will produce a double bend, as in Fig. 1, ora change in the angle of the elbow, as in Fig. 2. This feature I believeto be new.

The seams or joints between the parts, to allow the free reverseadjustment of the same, are formed as follows: The oblique ends of thearms of the elbow, and also of the rin gs or sections, are run through amachine which produces a wide horizontal bead or corrugation, a, allaround. The end of one ring is then slipped or sprung into the next, andso on, the bead of the one part striking and rostin g closely withinthat of the other part, as clearly shown in Fig. 3.

The advantage in this form of the joint is that a broad and wide bearingof the beads a c is produced, which gives strength to the connection ofthe rings, insures a free turning action, as the bracing and stiffenedform of the beads prevents warping or bend, and at the same time forms acloser contact or bearing than usual, which is essential in hot-air andsmoke pipes.

It will be noticed that the contact is over the whole swell of the bead.Furthermore, the bracing and stitteningform of the bead etfectuallyprevents warping of the ends of the rings, which ordinarily occurs bythe applica tion of heat on sheet metal, and which, in the presentinstance, would destroy the circle of the joint, and therefore preventthe easy turning of the parts when it is desired to change theadjustment. This form of the seam or joint is far superior to that inwhich a single iiange of one part rests in an overlapping sharp-edgedbead of Vthe other, in which case any warping of the seam orirregularity in the thin flange would interfere with the turning of theparts.

In one end or arm of the elbow is attached a hook or other device, b,with which connects a rod, C, which extends through the inside of theelbow and passes outfthrough the side of the other end of the elbow,where it has a nut, d, or other device for producing tension. By thismeans the elbow may be stiffened, if desired, Without nipping up theseams, as before described. This is particularly applicable inwater-pipes or for other uses where stron g pipe is required.

I do not claini simply the interposition of angular sections in a pipeto produce a bend, as I am aware that the saine have been before appliedin a stationary manner; neither do I claim a sea-1n or joint in whichone part ts loosely in another to allow a turning motion; but

What I claim as my invention isv l. The combination and arrangement, witthe ends A A of the elbow, of interposed rings B B, of wedge form, whichare connectedwith each other and with the said ends of the elbow by aloose joint or seam in such a manner that a reverse turn may be given tothe rings to change the angle or bend of the elbow, as herein described.

2. In combination with said parts, the seam or joint consisting of thebroad beads a a, fitting one within the other, as described.

3. The combination of the tension-rod C with an elbow having a loosejoint or joints7 substantially as set forth.

In witness whereof I have hereunto signed my naine in the presence oftwo subscribing witnesses.

II. B. MORRISON. Vitnesses:

It. F. OsGooD, GEO. W. Min'rr.

